code: def test_randomizedsearchcv_parameter_combinations_all_lists():
      """Ensure the parameter_combinations attribute populates correctly by
      checking its length."""
      param_distributions = {
          "bsl_options": {"method": ["als", "sgd"], "reg": [1, 2]},
          "k": [2, 3],
          "sim_options": {
              "name": ["msd", "cosine"],
              "min_support": [1, 5],
              "user_based": [False],
          },
      }
      rs = RandomizedSearchCV(SVD, param_distributions, n_iter=10)
      assert len(rs.param_combinations) == 10
  
file_path: Surprise/tests/test_search.py
imports: import os
  import numpy
  import pytest
  from scipy.stats import randint, uniform
  from surprise import Dataset, Reader, SVD
  from surprise.model_selection import cross_validate, GridSearchCV, KFold, PredefinedKFold, RandomizedSearchCV
label_desc: Use image node_id 7 for calling a global function with example usage: test_randomizedsearchcv_parameter_combinations_all_lists() without return types